The conjugate of an irrational binomial is the same number, but the sign of the irrational term is switched. Similarly, the conjugate of a complex number is the same complex number where the sign of the complex part is opposite to its original sign.
Binomial
Conjugate
Irrational conjugate
a+bc
a−bc
a−bc
a+bc
Complex conjugate
a+bi
a−bi
a−bi
a+bi
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